From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The fourth instance of a faulty valve spring breaking on a 20-HP test car, number 792.
| Identifier | ExFiles\Box 48\4\ Scan126 | |
| Date | 30th January 1924 | |
| c. Hs.{Lord Ernest Hives - Chair} X4226 EP{G. Eric Platford - Chief Quality Engineer}/Thn5/H30.1.24. re. 20-HP Faulty Valve Springs. With further reference to our EP{G. Eric Platford - Chief Quality Engineer}2/H14.1.24 and EP{G. Eric Platford - Chief Quality Engineer}1/H28.1.24, we are sending you a further valve spring which has broken on a car on test, No.792. This is now the fourth spring we have had broken on test, which breakage is fairly close on the top of previous breakages, and it would appear that we have come on to a bad batch of springs. EP{G. Eric Platford - Chief Quality Engineer}/Thn. | ||